"My body is just a filter. Coffee goes in, sarcasm comes out” is a coffee saying that has been printed on many images. The System comic has published this in comic form since at least February 11, 2009.
“Coffee. Because sarcasm needs to stay hydrated” is a related saying.
The System
February 11, 2009
Comic Panel 1: My body is just a filter.
Comic Panel 2: Coffee goes in.
Comic Panel 3: Sarcasm comes out.
Comic Panel 4: Oh, and pee. Lots of pee.
(Another comic is shown without this last line about “pee.”—ed.)
Twitter
purple sanders
@Wbbigdave
my body is a filter, coffee goes in sarcasm comes out.
4:48 AM - 18 Mar 2009
Twitter
omegatron
@omegatron
My body is just a filter. Coffee goes in. Sarcasm comes out. Oh, and pee. Lots and lots of pee. http://bit.ly/eB9S #comic
5:36 AM - 20 Mar 2009
Twitter
Beth Warren
@beth_warren
my body is a filter.. coffee goes in.. sarcasm comes out. Trying to write. something new today (promise!) http://sociopants.blogspot.com
11:20 AM - 22 Mar 2009
Twitter
Lance Titchkosky
@lance_t
coffee goes in, sarcasm comes out..... http://www.notquitewrong.com/rosscottinc/comics/2009-02-11.gif
1:32 PM - 1 Apr 2009
Elite Daily
49 National Coffee Day Quotes For Your Brew-tiful Pictures
By Tessa Harvey Sept 25 2017
(...)
39. “My body is just a filter. Coffee goes in, sarcasm comes out.”—Unknown
Twitter
22 Until None
@22UntilNone
The body is just a filter. Coffee goes in and sarcasm comes out.
8:05 AM - 16 Apr 2018
Twitter
nan joshi
@nanjoshi
My body is a filter.
Coffee goes in , SARCASM comes out. 
11:40 AM - 12 Jun 2018
Above, a 1934 plaque from the Big Apple Night Club at West 135th Street and Seventh Avenue in Harlem. Discarded as trash in 2006. Now a Popeyes fast food restaurant on Google Maps.
Recent entries:
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“People think I go out of my way to piss them off. Trust me, it’s not out of my way at all” (6/8)
•
Entry in progress—BP (6/8)
•
Entry in progress—BP (6/8)
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Entry in progress—BP (6/8)
•
Entry in progress—BP (6/8)
More new entries...
Above, Big Apple Corner at 54th Street and Broadway in Manhattan. Google Maps.
Above, John J. Fitz Gerald, from the Aug. 15, 1931, Binghamton (NY) Press, pg. 14.
Listen to Robert Emmerich introduce "The Big Apple," a hit song from 1937. Music written by Bob and performed by Tommy Dorsey's Clambake Seven with Bob on piano. Lyrics written by Buddy Bernier and sung by Edythe Wright. Audio provided by Dorothy Emmerich.
Also listen to a 1937 "The Big Apple" song by Ozzie Nelson and his Orchestra. See a 1929 photo of John J. Fitz Gerald and a 1931 photo of John J. Fitz Gerald.
This site is edited by Barry Popik.